Method for preparing biochar-based fertilizer by using macadamia nut shells

A slow-release fertilizer and macadamia nut technology, which is applied to fertilizers made from biological waste, waste fuels, organic fertilizers, etc., can solve the problems of declining agricultural product quality, changing soil properties, increasing production costs, etc. The utilization rate and the effect of improving the quality of agricultural products

Inactive Publication Date: 2015-04-08
CHONGQING UNIV OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The loss of chemical fertilizers not only increases production costs, but also causes eutrophication of lakes, reservoirs, rivers and other water bodies, changes in soil properties, decline in productivity, and decline in the quality of agricultural products, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1. Preparation of biochar-based slow-release fertilizer

[0037] The raw materials of the biochar-based slow-release fertilizer include the following components by mass ratio:

[0038] Modified biochar 30, cow dung biogas residue (30 mesh) 30, chemical fertilizer 31, a mixed solution of hydroquinone and cepiryl in a mass ratio of 1:1 3, bentonite 6.

[0039] Among them, the chemical fertilizer is to mix urea, superphosphate and potassium sulfate in a mass ratio of 1:2:2.

[0040] The preparation method: mix the ingredients according to the above ratio, extrude and granulate in a mold, sieve the granulated material, put it in an oven for drying, and obtain the bio-carbon-based slow-release fertilizer after cooling.

[0041] 2. Preparation method of modified biochar:

[0042] (1) Crushing the collected macadamia husks through an 80-mesh sieve.

[0043] (2) Take 100g of the above pulverized macadamia nut shells, add 25ml of 1.0mol / L dilute hydrochloric acid, stir and mi...

Embodiment 2

[0048] 1. Preparation of biochar-based slow-release fertilizer

[0049] The raw materials of the biochar-based slow-release fertilizer include the following components by mass ratio:

[0050] Modified biochar 32, cow dung biogas residue (30 mesh) 30, chemical fertilizer 33, a mixed solution of hydroquinone and cepiryl in a mass ratio of 1:1 3, bentonite 6.

[0051] Among them, the chemical fertilizer is to mix urea, superphosphate and potassium sulfate in a mass ratio of 1:2:2.

[0052] The preparation method: mix the ingredients according to the above ratio, extrude and granulate in a mold, sieve the granulated material, put it in an oven for drying, and obtain the bio-carbon-based slow-release fertilizer after cooling.

[0053] 2. Preparation method of modified biochar:

[0054] (1) Crushing the collected macadamia husks through an 80-mesh sieve.

[0055] (2) Take 100g of the above pulverized macadamia nut shells, add 25ml of 1.0mol / L dilute hydrochloric acid, stir and mix,...

Embodiment 3

[0060] 1. Preparation of biochar-based slow-release fertilizer

[0061] The raw materials of the biochar-based slow-release fertilizer include the following components by mass ratio:

[0062] Modified biochar 32, cow dung biogas residue (30 mesh) 27, chemical fertilizer 33, a mixed solution of hydroquinone and cepiryl in a mass ratio of 1:1, 3, bentonite 5.

[0063] Among them, the chemical fertilizer is to mix urea, superphosphate and potassium sulfate in a mass ratio of 1:2:2.

[0064] The preparation method: mix the ingredients according to the above ratio, extrude and granulate in a mold, sieve the granulated material, put it in an oven for drying, and obtain the bio-carbon-based slow-release fertilizer after cooling.

[0065] 2. Preparation method of modified biochar:

[0066] (1) Crushing the collected macadamia husks through an 80-mesh sieve.

[0067] (2) Take 100g of the above pulverized macadamia nut shells, add 25ml of 1.0mol / L dilute hydrochloric acid, stir and ...

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PUM

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Abstract

A method for preparing a biochar-based fertilizer by using macadamia nut shells comprises the following steps: a raw material macadamia nut shells undergoes anaerobic pyrolysis to prepare modified biochar, and the biochar is mixed with cow dung biogas residues, a chemical fertilizer, a urease inhibitor and a nitration inhibitor to prepare the high-efficiency slow release fertilizer. The slow release fertilizer prepared in the invention has the advantages of simple production process, easily available raw material, low production cost, effective increase of the utilization of N, P and K, reduction of the loss of nutrients, improvement of the quality of soil, improvement of the quality of agricultural products, and facilitation of the benign development of the agricultural ecologic system.

Description

technical field [0001] The invention relates to the technical field of preparation of biochar-based fertilizers, in particular to a method for preparing biochar-based slow-release fertilizers from macadamia husks. Background technique [0002] According to statistics, the annual consumption of chemical fertilizers in my country has reached 42.14 million tons, with an average of 368 kg / hm 2 , and there is still an irrational structure in the application process of chemical fertilizers, and the utilization rate of chemical fertilizers is extremely low. According to data, the average utilization rate of nitrogen fertilizer in my country is only 30% to 40%, phosphate fertilizer is only 10% to 20%, and potassium fertilizer is only 35% to 50%. The loss of chemical fertilizers not only increases production costs, but also causes eutrophication of lakes, reservoirs, rivers and other water bodies, changes in soil properties, decline in productivity, and decline in the quality of agr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/08C05G3/90
CPCC05F5/008C05G3/00C05G3/90C05G1/00Y02A40/22Y02E50/30Y02P60/21
Inventor 夏红霞朱启红
Owner CHONGQING UNIV OF ARTS & SCI
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